//===-- llvm/SymbolTableListTraits.h - Traits for iplist --------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file defines a generic class that is used to implement the automatic // symbol table manipulation that occurs when you put (for example) a named // instruction into a basic block. // // The way that this is implemented is by using a special traits class with the // intrusive list that makes up the list of instructions in a basic block. When // a new element is added to the list of instructions, the traits class is // notified, allowing the symbol table to be updated. // // This generic class implements the traits class. It must be generic so that // it can work for all uses it, which include lists of instructions, basic // blocks, arguments, functions, global variables, etc... // //===----------------------------------------------------------------------===// #ifndef LLVM_SYMBOLTABLELISTTRAITS_H #define LLVM_SYMBOLTABLELISTTRAITS_H #include "llvm/ADT/ilist.h" namespace llvm { class ValueSymbolTable; template<typename NodeTy> class ilist_iterator; template<typename NodeTy, typename Traits> class iplist; template<typename Ty> struct ilist_traits; // ValueSubClass - The type of objects that I hold, e.g. Instruction. // ItemParentClass - The type of object that owns the list, e.g. BasicBlock. // template<typename ValueSubClass, typename ItemParentClass> class SymbolTableListTraits : public ilist_default_traits<ValueSubClass> { typedef ilist_traits<ValueSubClass> TraitsClass; public: SymbolTableListTraits() {} /// getListOwner - Return the object that owns this list. If this is a list /// of instructions, it returns the BasicBlock that owns them. ItemParentClass *getListOwner() { typedef iplist<ValueSubClass> ItemParentClass::*Sublist; size_t Offset(size_t(&((ItemParentClass*)0->*ItemParentClass:: getSublistAccess(static_cast<ValueSubClass*>(0))))); iplist<ValueSubClass>* Anchor(static_cast<iplist<ValueSubClass>*>(this)); return reinterpret_cast<ItemParentClass*>(reinterpret_cast<char*>(Anchor)- Offset); } static iplist<ValueSubClass> &getList(ItemParentClass *Par) { return Par->*(Par->getSublistAccess((ValueSubClass*)0)); } static ValueSymbolTable *getSymTab(ItemParentClass *Par) { return Par ? toPtr(Par->getValueSymbolTable()) : 0; } void addNodeToList(ValueSubClass *V); void removeNodeFromList(ValueSubClass *V); void transferNodesFromList(ilist_traits<ValueSubClass> &L2, ilist_iterator<ValueSubClass> first, ilist_iterator<ValueSubClass> last); //private: template<typename TPtr> void setSymTabObject(TPtr *, TPtr); static ValueSymbolTable *toPtr(ValueSymbolTable *P) { return P; } static ValueSymbolTable *toPtr(ValueSymbolTable &R) { return &R; } }; } // End llvm namespace #endif